The largest single piece of gold ever found and
measured is called the Beyers and Holtermann
nugget. It was discovered in October 1872 in New
South Wales, Australia. It weighed roughly 630
pounds and measured 59 inches by 26 inches. At the
time, it was valued at more than $18,000. Adjusted
for inflation, that is roughly $350,000 now.
Additionally, gold prices have increased by four
times their amount in 1872. In other words, if a
piece of gold this size was found today, it would
be worth well over a million dollars!

Answer 2:

Great question! It turns out there is a bit of
debate about the largest piece of gold ever to be
found and in fact there are 2 specimens that claim
to be the largest. The first and potentially
better known has been called the `Welcome
Stranger´ and it was found at Moliagul in
Victoria, Australia in 1869. It´s weight? An
impressive 78 kilograms (which is roughly the
weight of a large grown man!). The second
potentially largest piece of gold is called the
`Canaa´ nugget. It was found on September 13, 1983
by miners at the Serra Pelada Mine in the State of
Para, Brazil. It´s weight? 60.8 kilograms, making
it the second largest gold nugget in history, but
as it still exists in its fully in tact form some
think it´s possible that the first estimate may
have been exaggerated and so it isn´t entirely
clear if the Welcome Stranger is bigger than the
Canaa nugget. Either way, pretty big pieces of
gold, right?!